Rotary drilling rig



FIG. 1 is a right-front-top perspective view of a rotary drilling rig showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a right-rear-top perspective view thereof;

FIG. 8 is a left-front-top perspective view thereof;

FIG. 9 is a left-rear-top perspective view thereof;

FIG. 10 is a right-front perspective view thereof;

FIG. 11 is a right-rear perspective view thereof;

FIG. 12 is a left-front perspective view thereof; and,

FIG. 13 is a left-rear perspective view thereof. 

CLAIM The ornamental design for a rotary drilling rig, as shown and described. 